How do the course contents work at a 4 year university?

Do courses for a bachelor’s have the same similarity as community colleges? Depending on the professor’s preference of how they want to set up the course. Like for an associate degree at my community college, a course can consist of labs, homework, writing, final essay, midterm, finals, quizzes, projects.

When a student signs up for a university to pursue a BS degree, do they have to take a placement test again just like a community college?

Do all universities have a college directory, where the student can look up the professor and email them asking them questions about the course, before joining?

I’m just comfortable with the CC pattern, don’t want any surprises once, I sign up for a university.